Write the equation of the line through points (5, 5) and (1, 0)

(5,5)(1,0)
slope(m) = (0 - 5) / (1 - 5) = -5/-4 = 5/4

y = mx + b
slope(m) = 5/4
(5,5)...x = 5 and y = 5
now we sub and find b, the y int
5 = 5/4(5) + b
5 = 25/4 + b
5 - 25/4 = b
20/4 - 25/4 = b
-5/4 = b

so ur equation is : y = 5/4x - 5/4